[PATCH] D21623: AMDGPU: Add option to disable spilling SGPRs to VGPRs.

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
Herald added subscribers: kzhuravl, arsenm.

This can help debug spilling problems.

http://reviews.llvm.org/D21623

Files:
  lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

Index: lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
===================================================================
--- lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
+++ lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
@@ -1,11 +1,10 @@
-//===-- SIMachineFunctionInfo.cpp - SI Machine Function Info -------===//
+//===-- SIMachineFunctionInfo.cpp -------- SI Machine Function Info -------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
-/// \file
 //===----------------------------------------------------------------------===//
 
 
@@ -22,6 +21,11 @@
 
 using namespace llvm;
 
+static cl::opt<bool> EnableSpillSGPRToVGPR(
+  "amdgpu-spill-sgpr-to-vgpr",
+  cl::desc("Enable spilling VGPRs to SGPRs"),
+  cl::ReallyHidden,
+  cl::init(false));
 
 // Pin the vtable to this file.
 void SIMachineFunctionInfo::anchor() {}
@@ -178,6 +182,9 @@
                                                        MachineFunction *MF,
                                                        unsigned FrameIndex,
                                                        unsigned SubIdx) {
+  if (!EnableSpillSGPRToVGPR)
+    return SpilledReg();
+
   MachineFrameInfo *FrameInfo = MF->getFrameInfo();
   const SIRegisterInfo *TRI = static_cast<const SIRegisterInfo *>(
       MF->getSubtarget<AMDGPUSubtarget>().getRegisterInfo());


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D21623.61616.patch
Type: text/x-patch
Size: 1452 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20160622/006c9b4a/attachment.bin>